I'm still laughing that you put 'I get paid weekly' in your post. Sorry, but I've got the giggles today and can't make sense of that bit. You'll have to forgive me, I'm in a really good mood today. Read your own post again and I am sure you will laugh.
On a serious note though and to help you out, you should start counting days past ovulation (DPO) from the 29th as this is literally the first day past ovulation for you.
So yes on the 7th March you would be 8DPO.
It's really up to yourself when you test and there are pros and cons for which day you choose to start on. Statistically, the majority of positives are seen from 12DPO, with a small percentage of very lucky women getting positive HPT's from 10DPO and an even smaller percentage earlier than that again.
If you think you can handle negatives and not stress yourself out too much, then I say start at 8DPO. However if you have willpower and are sensible (unlike me) then you could wait for a more realistic date of 12DPO.
Let us know what you choose and good luck.
